in twice

This is because you halved the amount of light being let through the aperture opening, but let in twice as much light by keeping the shutter open longer.

这是因为前一组你用了一半的光圈，而后一组用了一半的快门时间。

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Firstly, using the contraction mapping principle, combining some priori estimates and the convergence of Bessel function, the well_posedness of solutions of the initial value problem in twice continuous differentiable space was obtained according to the equivalent integral equation of initial value problem for the Klein_Gordon equations.

首先利用压缩映象原理，结合一些先验估计式及Bessel函数的收敛性，根据Klein Gordon方程初值问题的等价积分方程，在二次连续可微空间中得到了初值问题解的适定性；

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The village was snowed in twice last year.

这个村庄去年两次被雪封住.

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Put the drops in twice a day, morning and evening.

每日两次, 早上和晚上滴用.

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They are in twice daily radio contact with the rebel leader.

他们每天用无线电和叛军首领联系两次。

《柯林斯高阶英汉双解学习词典》

The horse came in twice in the third and fifth races.

这匹马赢了两次第三次比赛和第五次比赛.

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